Dental controller



May 14 1940- A. w. HILLER 2,200,621

DENTAL lCONTROLLER Filed Sept. 6, 1939 INVENmF j ,ff BY (M lng/AM ATTORNEY Patented May 14, 1940 @TENT WEEE 3 Claims.

This invention relates to dental equipment and has particular reference to apparatus and design L.for a dental controller, such as those used on the Tioor behind and near the dental chair for the regulation of the speed of electrically driven instruments.

The principal object of the invention resides in the provision of a novel pedal arrangement to be used in conjunction with the conventional type controllers now in use and seeks to create a device of this character for the more conven- 'lent use by an operator at all usual operating positions without moving the controller.

Another object of the invention is in the provision of a device of this character whereby time 'is saved by the operator since, by use of this improved device, the controller need not be moved from its position on the iioor with the changing of the operators position.

A further object of the invention resides in the provision of a device whereby the operator has better balance and relaxation, thus insuring better workmanship.

A still further object of the invention is in the provision of a device that will make for the 'saving of unnecessary wear and abuse to the 'controller and the floor coverings.

Broadly, the invention seeks to provide an imv"provement for dental controllers, and the like, whereby the utility and eiciency of such devices 'are enlarged as well as in the provision of a device of this character whereby the operator may assume all normal operative positions without moving the controller.

In the conventional type controllers the pedals 'are arranged at opposite ends of a single bar passing through the device and are positioned 'near the iioor and are turned by the operators Toot a varying number of degrees, according to the speed desired in the electrical instruments, thus necessitating the feeling for a single pedal, and often the moving of a controller on the floor, when operating. The present invention seeks to provide a controller wherein the operators toes may be inserted between pedals for operatingT Lthe device from any normal operative position without taking his eyes from his work as well as eliminating the necessity of moving the con- 'troller during operations in order to convenient ly reach the pedals. With the foregoing objects as paramount, other rand lesser objects will become manifest as thel description proceeds, taken in connection with the appended drawing wherein:

Figure 1 is a perspective view of a conventional 'dental controller with the present invention attached thereto.

' rFigure 2 is a plan View of one form of the invention, illustrating the conventional pedals in 'dotted lines.

Figure 3 is a fragmentary elevational View of the invention attached to a conventional den- 'tal control pedal.

Figure 4 is a cross sectional View of the invention taken on unes l441 of Figure 2 and iuus- 10 trating a conventional control pedal in elevation.

Figure 5 is a fragmentary plan view of a modiiication of the invention as applied to another 'conventional type control pedal, and

Figure 6 is a cross sectional view of the modification taken on lines 6 6 of Figure 5.

Continuing 'with a more detailed description of the drawing, the numeral I generally designates `a dental controller that is provided with vertically arranged pedals 2 integral with the controller arms 3, the preferred form of the invention being an attachment for the said pedals and arms, although, obviously, the attachment may be made integral with the said pedals and 25 arms.

A semi-circular bar 4 is provided, as particularly illustrated in Figures 1 and 2, for attachment to the arms 3 by means of angularly re- 'cessed projections 5 designed to conform with the shape of the said arms and are retained in place 'by clamps 6, which are similarly recessed, bolted to the said projection and 'enclosing the said arm. The projections 5 and the clamps 6 r are provided. with lugs l designed to conform with the upper side of the conventional pedals `'2, as' illustrated in Figures l, 2, 3, and 4, and 'since the arms 3 are tapered toward their lower end the above described arrangement makes for the rigid securement of the bar fl. vertically arranged pedals 8 are positioned on the outer side of the semi-circular bar 4 at distances to provide engagement between any two of the said pedals and the operators toe. In the modification as illustrated in Figures 5 and 6 the parts of the invention are substan- "tially the same, being changed only as totheir shapes, and are intended for attachment to an- 'other conventional type dental controller. The 'semi-circular bar 4 is secured to a tapered arm 3 by means of a clamp 6 having a recess therein to conform to the shape of the said arm.

In operation the controller i is placed on the floor near the back of a dental chair and, as be- 'fore stated, is operated by the operators foot.

in view of the above description it can be seen that the controller I need only be felt by the operators toe in order to have a pedal conveniently located to the operator in all usual operating positions eliminating the necessity of looking 'at the device or moving the same after an operation has Ibeen started.

Manifestly, the structure shown is capable of 'considerable changes and modifications for adaptation to any or all types of dental control- 1ers from time to time by those versed in the art, and such modifications as may be considered Within the Spirit and intent of the invention may also be considered as falling Within the scope of the appended claims.

' What is claimed is:

1. In combination with a dental controller, having controller arms and pedals, a semi-circular bar for attachment with the said arms and pedals, vertically disposed pedals projecting out- Wardly from the said bar, the last named pedals 'being positioned at intervals with respect to each other.

2. In combination with a dental controller having pedals attached to supporting arms, a semi-circular bar, recessed projections integral with the ends of the said bar for attachment to the said arms, clamps cooperating With the 'said projections and engaging the said arms, vertically disposed pedals integral with and proiecting from the said semi-circular bar, and outwardly projecting lugs to engage the upper edges of the first named pedals.

' 3. In combination With a dental controller 'having pedals attached to supporting arms, a semi-circular bar for attachment with the said arms and pedals, pedals integrally arranged `along the said semi-circular bar and spaced for 'cooperation with the operators toe.

ALBERT W. KILLER. 

